Dust-removing pneumatic machine.



J. R. BLUM. DUST REMOVING PNEUMATIG MACHIN E.

APPLIOATION FILED NOV. 29, 1907.

Patented Apr. 13, 1909.V

SHE TS-SHEET 1. zl F J2 112 /A/ VEA/7a i? J. R. BLUM. DUST REMOVING PNEUMATIG MACHINE.

l APPLIOATION FILED NOV. 29, 1907.

Patented Apr. 13, 1909. 2 SHEETS-SHEET Z. l- I 2 'UNITED srnrns rArEN'r carton.

JULES REN BLUM, OF PARIS, FRANCE, ASSIGNOR TO THE .INTERNATIONAL ASPIRATOR COMPANY LIMITED, OF LONDON, ENGLAND.

DUST-'REMOVING PNEUMATIC MAcHrNr' f i No. 917,993.

Speccation of Letters Patent.

Patented April 13, 1909.

Application led November 2 9, 1907. Serial No. A404,3l8.

To all whom it may concern:

.Beit known thatl, JULES REN Bourgy citizen of rance, residing at 9 Rue de llsly,

' specification.

A This invention relates to improvements in dust removing pneumatic machines and has for its principal object an improved construction of the filtering device whereby the filtering material mag be easily cleaned from outside without it eing lnecessary to unmount'the casir'ig in which said device isLinclosed and whereby the dustA accumulated after a certain Atime in'said vcasing may be easily removed therefrom owing to the very simple locking means of the filtering device in its casing.

A further object of the invention is to p rovide for a new arrangement of the suction device capable of being adapted tothe iiltering device in such a manner that it occupies the smallest space possible. i

In the accompanying drawin s, `figure 1 isa vertical sectional view of t e machine, liig. 2 is a horizontal sectional lview taken through line B- B of Eig. 1, and lig. 3 is a vertical sectional 'view of the lower part of the machine showing a modiiied form of construction of the controlling means of the suction device ofthe machine. Fig. 1 is a detail plan ofthe cover securing means.

Referring to Fig. 1, it may be seen that the iltering device is inclosed in a sheet metal box c havin a round opening large enou h. to allow of ee passage to the iiltering evice. This o ening is closed by a cover b by means o -a bayonetl joint. For this purpose the box ais provided with a certain number of lugs c, of which onl one is shown in the drawin and the rim of the A cover is provided Wit a number of slots corres ondmg to the numb er of lugs.

he cover b has formed. in its center a tubular extension d adapted to fit snugl5T in an opening in a artition e of the casing f of the machine. pposite the tubular extension d and rigidly secured to the cover b is arranged a ilan e g from which extends a receptacle forme of metallic hoops la This receptacle is inclosed in an envelop' or shell 'i of loose lrous material or the like adapted to retain the dust and to let ass there through only the air.' The dusteden airis v-in the drawings.

The filtering material is adapted to bel sucked through a tube c l connected through the casingf With the suction nozzle not shown cleaned hy means -of a sheet metal brush operated from outside by a crank handle This hrush consists of a rod 7c with a series of thin sheet metal blades Z secured thereto with close adjacent edges and having their freeV ends adapted to hear against the ltering material. The rod lc is hent on oneend to form a crank as at -m and this crank is ysecured to the same in n as the crank handle y'. The pin fnJ which is mounted on suitable bearings in the top of the box Aai, andy the removable lid of the casing f is preferably rovided with annular grooves ii adapte to revent the dust from assing through the ,ox a. The other end o the rod lc is extended forming an angle arm o which is guided during the rotation of the brush in a groove p' vmulated in the box a it may be discharged by removing the Whole box from the top of the casing f and by unlocking then the cover l) as may be easily understood.

The suction device of the machine comprises three bellows g the movable flaps of which are mounted on a single stationary flap r parallel with the partition e of the casing. he movable flaps are controlled by three depending links s connected to a Winch driving shaft t having three cranks arranged at 120 one from'each other.. Rotary inotion isimparted to shaft t either by a belt and a hand Wheel asl seen in Fig. 1 or hy an electric motor and gear wheels as' seen in glhe space comprised between the flap r and the partition eis divided into a large and a smallv compartment u' and i; respectiv'ely.v

the other handfthe compartment 'u isproicio l opening y.

vided with ,inlet valves .r and a discharge As may be easily understood, the dustladen air is sucked through the filtering material which retains the dust, and the pureA air is sucked by the bellows through they tubular extension d and i'lange g and the suction valves uf,v and is expelled through the valves n; and the discharge opening y.

An adjustable valve 'z 'may be 'provided on the partition e to reduce more or less at will the degree of lvacuum in the suctionl compartment u. Having now described my invention, what I claim as new and desireto secure-by Letters Patent is: 1. In a machine for removingdust by suction, a filtering device comprising a metal y box with which the suction nozzle communicates, said box having an openingv in its bottom, a removable cover tor said opening.

havin an u wardl f extending lian e Vand a dowrnvardly projecting tubular extension,

said cover having'. an annular groove formed on itsI interioraround the ila-nge, ai suction device communicating with the tubular extension, a vreceptacle formed of metallic hoops, and a ltering envelop, and extending upwardly from the Harige, a brush comprising a rod'and a. series of thin sheet metal blades having their edges in close contact and `adapted to bear against the filtering envelop, a crank arm secured to-each end oi the rod, one of s'aid arms being guided in the annular groove, and a handle connected to the other arm. i Y Ff 2. In amachine for removing dust by-suction a filtering device comprising a sheet metal box a into which leads the suction envelop e nozzle, the bottom wall of the. box having v an opening therein, a cover b adapted to be locked against the opening of the box by means of abayonet joint, a downwardly projecting tubular extension on the cover .and-

an upwardly extending flange thereon, a receptacle formed'of metallic hoops h and exhorizontal partition into a large compartment u and a small compartment fv, suction valves w opening into the large compartment, valves a: connecting the bellows with the small compartment, said lilap rhaving a discharge opening 'y connectingthe vsmall compartment with the 'outside air, a winch driving shaft having three cranks arranged at 120 one from each other, three depending links s connecting the movable flaps of the bellows to the cranks of the driving shaft, and means for imparting rotary'llnotion to shaft t substantially as described and for the purpose set forth.

In'testimonywhereof I yhave signed my name to this specification in the presence of two subscribingwitnesse's.

, JULES RENE BLUM.

Witnesses: i

, ANTOINE 'LAvoIN DEAN B. MAsoN. 

